[Tigers] Help!

[Alan Zeni]

The machine shop is not answering his phone so I am turning to all of you
for some help.  I'm getting ready (or was) to fire up the 289.  I pressured
up the oil - no leaks.  Started to fill the cooling system and had a leak
out of the block.  It is on the drivers side, rear third.  It is small and
feels threaded.  Can anyone tell me if it is a freeze plug or a threaded
hole.  And if threaded, what size it is?

Thanks.